I'm also on synthroid and Femcon and I have been getting blurred vission. I've also gained a about 7lbs. I'v been on the Femcon for about 2-3 months, Like some of the other comments on this page i have been getting crying spells and acne. I feel for you...
I'm not on synthroid, but I was on Femcon (as of Feb. 4, I wasn't anymore). It's femcon that's making you have blurred vision. I stopped taking the pill. I took it before I got pregnant and it didn't do me this way. I feel for you as well. I hope all of us women get back to feeling like ourselves soon.